Burg Tailfingen, Medieval castle ruins in Tailfingen, Germany.

Burg Tailfingen, also called Tailfinger Schloss, is a ruined hilltop castle on the 937 m Schlossberg about 1,000 m southeast of Tailfingen. The site measures roughly 80 by 50 m and comprised a core castle with a Romanesque chapel and an outer bailey. The Schlossfelsen drops steeply to the northwest; the other sides are enclosed by a small rampart and a ditch. A 22-step-long, 16-step-wide stone house (about 7 by 5 m) with a corner tower once stood on the rock ledge.

The Lords of Tailfingen built this hilltop fortress around 1100 to guard their territories. The castle fell into disuse before 1250 and was sold to the Württemberg dynasty in 1403, marking the end of local noble rule.

The castle chapel stood in the core castle, its apse foundations uncovered in 1983 directly adjoining the tower to the west. The name Tailfinger Schloss, still used for the site, keeps the memory of the castle in local speech. The visible traces on the Schlossfelsen all belong to the medieval complex.

The castle stood on the Tailfinger Schlossfelsen, which drops steeply to the northwest; the other sides are enclosed by a small rampart and a ditch. The whole site measured about 80 by 50 metres. The apsis foundations of the castle chapel, uncovered in 1983, lie west of the tower.

The visible masonry belongs entirely to the medieval castle, but the Schlossberg also carried a separate prehistoric hillfort or refuge, now vanished, thought to have belonged to the settlement of the Degerfeld. Nothing of that earlier earthwork is preserved above ground.